Smoke-consuming apparatus for locomotive-boilers.



No. 784,881. PATENTED MAR. 14, 1905. S. P. PIERCE. SMOKE CONSUMING APPARATUS FOR LOCOMOTIVE BOILERS.

No. 784,881. 9 PATENTED MAR. 14, 1905. S. P. PIERCE.

SMOKE GONSUMING APPARATUS FOR LOGOMOTIVE BOILERS.

APPLICATION FILED JAN. 27, 1905.

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S. P. PIERCE. ING APPARATUS FOR LOGOMOTIVE BOILERS.

SMOKE GONSUM APPLICATION FILED JAN,27, 1905.

3 SHEETS-SHEET 3.

UNITED STATES Patented March 14, 1905.

PATENT OFFICE.

SIMEON F. PIERCE, OF ST. PAUL, MINNESOTA.

SPECIFICATION forming part of Letters Patent No. 784,881, dated March 14, 1905.

Application filed January 27, 1905. Serial No. 242,818.

To It whom it nuty concern:

Be it known that I, SIMEON F. PIERCE, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Smoke-Consuming Apparatus for Locomotive-Boilers, of which the following is a specification.

y invention relates to improvements in smoke-consuming apparatus for boilers of the locomotive type or internally-fired boilers, and has for its object to provide improved means for consuming the smoke and gases generated from freshly-supplied fuel and at the same time increasing, or at least not materially decreasing, the efiiciency of the boiler. To that end my invention consists in the construction,combination,and arrangement of parts hereinafter described and claimed.

In the accompanying drawings,forming part of this specification, Figure 1 is a longitudinal section through the fire-box and rear portion of the boiler of a locomotive embodying.

my invention, taken partly on line o and partly on line w w of Fig. 3. Fig. 2 is a view,

partly in side elevation and partly in section,

on line 4) n of Fig. 3 of the forward portion of the boiler. Fig. 3 is a view of the same, shown partly in rear elevation and partly in section, on line in (a of Fig. 1. Fig. 1 is a transverse section taken partly on line y y and partly on line 2 e of Fig. 2, and Fig. is a detail showing one of the slide-dampers between the,

ash-pans.

Extending through the furnace portion of the boiler from the rear flue-sheet 2 to the rear water-leg 3 is a water-wall 1, dividing the furnace longitudinally, so that there is on each side of the water-wall a separate and independent fire-box 5 having the usual grate 6, and extending longitudinally between the ashpans 7 under the fire-boxes is a partition-box 8, which separates one ash-pan from the other. The water-wall is a hollow shell open at top and ends to provide communication with the interior of the boiler and its water-legs, so that water from the boiler may circulate freely through the water-wall. In the drawings are shown openings 9 and 10 in the walls of the forward and rear water-legs 11 and 3, respectively, through which the water from the boiler may pass into and out of the waterwall at its ends.

Extending longitudinally through the upper part of the water-wall, which is widened sufficiently to receive it, is a large fine 12, extending from the rear flue-sheet to the front wall of the rear water-leg 3. The bottom of the flue 12 and of the widened portion of the water-wall inclosing it inclines upwardly toward the rear water-leg. At the rear end of the fine is a manhole 39, extending through the rear water-leg, so that the flue may be cleaned and the ends of the smaller communicating flues, hereinafter described, may be calked and repaired. Extending downwardly from the bottom of the large flue 12 through the lower part of the water-wall are a number of branch flues13. These flues pass through the bottom 14; of the water-wall to the partition-box 8 between the ash-pans. In each of the side walls 15 of the partition-box is a slide-damper 16, whereby communication between the branch flues 13 and the ash-pan on either side of the partition-box may be opened or closed. The slide-dampers may be operated by any suitable mechanism, such as the bell-crank 17. (Shown in Figs. 1 and 5.)

At the forward end of the boiler is a damperbox 18, formed by a transverse wall 19, arranged in front of the forward flue-sheet and having an opening 21 communicating with the smoke-stack 22.

As shown in Figs. 3 and 41 of the drawings, the boiler-fines are arranged in three groups, the fiues of the side groups 23 and 24 leading from the two fire-boxes, respectively, to the damper-box 18 and the middle group 25 leading from the water-wall fine 12 to the damperbox. In order to control and direct the course of the smoke and gases after they have reached the damper-box, I have arranged within the damper-box a damper 26, mounted upon a damper-rod 27, rotatably supported in the wall 19 and the rear boiler-head 28 and preferably arranged in a tube 29, passing through the boiler. The damper may be operated by a hand-lever 30 upon the damperrod. The damper 26 extends on both sides of the damper-rod to the periphery of the shell 31 of the damper-box and fits closely to the two end walls of the box, so as to form a complete closure. The groups of boiler-fines 23, 24, and 25 are so arranged that when the damper is swung into extreme position on either side the group of side fines on that side and the opening 21 to the smoke-stack will be completelyseparated from the middle group of fines and the side group on the other side. Thuswhen the damper is turned into the position shown in full lines in Fig. 4 the smoke and gases coming through the fines 23 will be shut off from the other groups of boiler-fines 24 and 25 and will pass off through the opening 21 to the smoke-stack, while the smoke and gases coming from the other firebox through the group of fines 24 will be shut off from the opening to the smoke-stack and will have no other means of escape except back through the middle group of fines 25 to the water-wall fine 12.

In order not to obstruct the opening 21,1eading to the smoke-stack, the steam-pipe 32 is divided into two branch pipes 33 before passing through the forward fine-sheet.

The operation of the apparatus will be easily understood. When the fire upon the rightliand grate needs replenishing, the damper 26 will be turned into the position shown in full lines in Fig. 4, shutting off the right-hand fines 24 from the opening to the smoke-stack. The smoke and gases will therefore pass back through the middle group of fines 25 to the fine 12 in the water-wall and thence to the partition-box between the ash pans. The slide-damper in the side of the partition-box adjacent to the right-hand ash-pan will be closed and the slide-damper in-the side adjacent to the left-hand ash-pan will be opened, so that the smoke and gases will pass up through the well-coked fuel upon the lefthand grate and be consumed thereby. When the fuel on the right-hand grate has itself become well coked, the damper 18 is swung over into the position shown in dotted lines in Fig. 4, so that the gaseous products of combustion may pass directly out from the righthand fines to the smoke-stack, and the fire on the left-hand grate may be replenished and the smoke and gases arising therefrom may be led back and passed through the fire on the right-hand grate in the manner described.

When it is desired that the smoke and gases from both lire-boxes shall pass directly out to the smoke-stack without being first returned through the middle group of fines to the fire, the damper 26 may be turned into intermediate position, so that the opening 21 shall be partially open to each of the groups of fines 23 and 24. As with the damper in this position there will be no returning gases passing back through the water-wall fine, this flue being out of action, as it were, it is desirable to provide means for preventing the outside air from entering through the slide-dampers and 1 passing up through the water-wall fines and cooling the boiler. For this purpose a tilting bar 34 is arranged within the partition-box between the ash-pans. The bar is hinged at its forward end upon the under side of the bottom of the water-wall by a hinge 35 and is positioned directly beneath the lower ends of the branch fines 13 and in alinement therewith. The upper side of the bar is provided with a number of plugs 36, preferably conical in shape, so disposed that when the bar is raised by suitable mechanism, such as the handle or rod 37, each plug will register with and lit into the corresponding branch fine 13. The plugs are loosely bolted to the bar by bolts 38 in such manner'as to allow them sufficient play to form a complete closure for the branch fines even though the supporting-bar 34 should be warped or bent a little out of alinement.

It will be seen from theforegoing description that the water in the boiler circulates freely through the water-wall and around the fines therein, thus constituting a water-jacket, which protects the fines from destruction, and 'also gives additional heating-surface to the water in the boiler, and the heat of the smoke and gases returned through the water-wall fines is utilized and made effective in heating the water in the boiler.

It will be evident that modilications may be made in the details of construction and arrangement without departing from the principle of the invention, the scope of which is defined in the claims.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with two separatedsets of fire-boxes and ash-pans, of a boiler of the class described, a damper-box and smokestack at the forward end of the boiler, a passage from the dam per-box to the smoke-stack, two separated groups of fines leading from the damper-box through the boiler to the two lire-boxes respectively, a third group of fines leading from the. damper-box through the boiler to the ash-pans, means to shut off said third group of fines from either one of the ash-pans, and a damper inthe damper-box capable of being turned into position to shut off the group of fines leading to one fire-box and the group of fines leading back to the ash-pans, from the passage to the smoke-stack and the group of fines leading to the other lire-box.

2. The combination with two sets of fireboxcs and ash-pans, of a boiler of the class described and its fine-sheets, a water-Wall extending longitudinally between the fire-boxes and communicating with the interior of the boiler, a fine or fines within the Water-wall extending from the rear fine-sheet to the ashpans, fines extending through the boiler, said fines being arranged in three groups, one

group extending from the fire-box on one side of the water wall to the forward flue-sheet, another group extending from the fire-box on the other side of the water-wall to the forward flue-sheet, and the third group extending from the flue within the water-wall to the forward flue-sheet, and means at the forward ends of said boiler-flues for returning the smoke and gases passing through either of the fire-box flues rearwardly through the flues communicating with the water-wall flue.

8. The combination with two separated sets of fire-boxes and ash-pans, of a boiler of the class described and its flue-sheets, a water-wall extending longitudinally between the fireboxes and communicating at different points with the interior of the boiler, a longitudinally-extending flue within the water -wall, downwardly-extending branch flues leading from the longitudinal flue to the ash-pans, a

group of flues leading from the fire-box on each side of the water-wall to the forward flue-sheet, a third group of flues extending through the boiler from the flue in the waterwall to the forward flue-sheet, means to direct the products of combustion passing through the flues from the fire-boxes into the flues leading to the water-wall flue, and dampers to open or close the communication between said downwardly-extending flues and the ash-pan under either fire-box.

L. The combination with two separated sets of lire-boxes and ash-pans, of a boiler of the class described and its flue-sheets, a damperbox and smoke-stack at the forward end of the boiler, a passage from the damper-box to the smoke-stack, a dividing-wall extending longitudinally between the iire-boxes, a flue or flues within the dividing-wall extending from the rear flue-sheet to the ash-pans, three separated groups of boiler-flues leading from the rear flue sheet forwardly through the boiler to the damper-box, two of the groups leading from the two fire-boxes respectively, and the third group leading from the flue in the dividing-wall, a damper in the damperbox to direct the smoke and gases either into the smoke-stack or back through the third group of boiler-flues to the flue in the dividing-wall, and dampers in position to open or shut off communication between the dividingwall flues and the ash-pan beneath one or other of the fire-boxes as may be desired.

5. The combination, with two separated sets of fire-boxes and ash-pans, of a boiler of the class described and its flue-sheets, a damperbox at the forward end of the boiler, a passage from the damper-box to the smoke-stack, a water-wall extending longitudinally between the fire-boxes and communicating with the interior of the boiler, a flue or flues within the water-wall extending from the rear flue-sheet to the ash-pans, two separatedgroups of boiler-flues leading through the boiler from the two fire-boxes, respectively, to the damper-box, a third group of flues leading from the water-wall flue to the dam per-box, a damper in the damper-box capable of being turned into position to shut off the group of flues leading from one fire-box and the group of flues leading from the water-wall flue, from the passage to the smoke-stack and the group of flues leading from the other tire-box, and means to shut off the water-wall flues from either or both of the ash-pans.

6. The combination with two separated sets of lire-boxes and ash-pans, of a boiler of the class described, its flues and flue-sheets, a dividing-wall extending longitudinally between the fire-boxes, a longitudinally-extending flue within the dividing-wall, downwardly-extending branch flues leading from the longitudinal flue to the ash-pans, a group of flues leading from the fire-box on each side of the dividingwall to the forward flue-sheet, a third group of flues extending through the boiler from the forward flue-sheet to the flues in the dividingwall, means to direct the products of combustion passing through the flues from the fireboxes into the flues leading to the dividingwall flue, a partition-box extending longitudinally between the ash-pans and communicating with the lower ends of the downwardlyextending branch flues, dampers arranged in each side of the partition-box to open or close communication with either of the ash-pans, plugs arranged in the partition-box in position to close the ends of the downwardly-extending flues, and actuating mechanism therefor.

In testimony whereof I aflix my signaturein presence of two witnesses.

SIMEON F. PIERCE. Witnesses:

ARTHUR P. LOTIIROP, EMILY F. (has. 

